On: Your API Consumers Aren’t Who You Think They Are

[contingencies]

This seems like a reasonable place to remind people of the importance of multilingual APIs/API documentation, too.

[nadiac → contingencies]

Still depending of your users. Ir your users prefers an other language than english, do it. It can be a competititve advantage. But be sure to know your users to do that, because english is ruling the API documentation world.